from typing import List


class Solution:
    def twoSum(self, numbers: List[int], target: int) -> List[int]:
        size = len(numbers)
        if size < 2:
            return []
        left = 0
        right = size - 1
        while left < right:
            if numbers[left] + numbers[right] == target:
                return [left + 1, right + 1]
            elif numbers[left] + numbers[right] < target:
                left += 1
            else:
                right -= 1
        return []
